A tiny site per recurring group that publishes the next meetup, handles cancellations properly, and exports a calendar feed people subscribe to once.
A marketplace where small workshops sell the hours their laser cutters, CNC mills, and kilns spend sitting still.
A small web app that lets a neighbourhood share drills, ladders, and camping gear without the chat group losing track of who has what.
A web app that runs brackets and live scoring for board game and tabletop tournaments, so organizers stop tracking matchups on a whiteboard.
A mobile app that tracks scores across board game sessions and turns them into per-player stats, streaks, and head-to-head records for regular game groups.